There has been much debate over the Liberal government's decision to hold a plebiscite to pass same-sex marriage in Australia.

And pop princess Kylie Minogue and her fiancé Joshua Sasse have weighed in on the debate, declaring their support for marriage equality.

The I am Spinning Around singer told the Daily Telegraph that Australia was 'backward' when it came to legalising same-sex marriage, proclaiming other countries that had permitted the union did not have 'the earth cave in'.

Scroll down for video

'He just can't fathom that same-sex marriage hasn't been legalised': Kylie Minogue and her fiancé Joshua Sasse have weighed in on the same-sex debate, declaring their support for marriage equality

She continued to add her English boyfriend was also vocal on the topic and would push for same-sex legislation to pass in her native country.

Share this article

'He's so adamant to fight for gay rights in Australia and it's coming from the most genuine place,' she told the publication.

'He just can't fathom that same-sex marriage hasn't been legalised and of course I back him up on that.'

Helping out: She continued to add her English boyfriend was also vocal on the topic and would push for same-sex legislation to pass in Australia

Meanwhile, Kylie, 48, and her 28-year-old boyfriend made their engagement official with a notice in the marriages section of the UK's Daily Telegraph in February.

The small advert in the Saturday paper read: 'Mr J.S. von Sasse and Miss K.A. Minogue.

'The engagement is announced between Joshua, so of the late Dominic Sasse and of Mary Heale (nee Macauley), of Herefordshire and Kylie, eldest daughter of Ronald and Carol Minogue, of Melbourne, Australia.'

It is thought the couple may have chosen to announce their engagement in the Telegraph because of Mr Sasse's family links to the newspaper.

His maternal great-grandfather William Berry, 1st Viscount Camrose, bought the paper in 1927 and also owned The Sunday Times and other newspapers.

Making it official: Kylie, 48, and her 28-year-old boyfriend made their engagement official with a notice in the marriages section of the UK's Daily Telegraph in February

Mr Sasse's father died in a plane crash in Nepal at the age of 37 when his son was just four year's old.

But according to The Sun, the couple announced the news to pals at the NME party earlier in the year, with a source telling the newspaper: 'Kylie may have been keeping tight-lipped, but Josh isn't as keen to keep it a secret.'

The source continued: 'He was proudly calling her his fiancée to several guests and even joked that being with her meant he wouldn't have any trouble getting into parties.'

Kylie was reportedly presenting an award during the show as Joshua made the remarks.

Future plans: The couple aledgedly announced the news to pals at the NME party earlier in the year

The paper wrote that Joshua is believed to have proposed while on a Swiss skiing trip over the festive period.

The pair first met on the set of Joshua's show Galavant, in September – Kylie had a guest role in the series – and they have been inseparable since.

In December, Kylie told Desert Island Discs host Kirsty Young she now realises there is more to life than fame and fortune.

'I want more of out of life, I really do,' says the singer. 'Who knows if family is on any one of my horizons? I don't know. But if that were to happen that would be incredible.'

And speaking to The Mail on Sunday's You magazine last year, Kylie insisted that despite the 20-year age gap, she and Sasse are the perfect match.

'I can't actually put into words how happy I am… We just completely fit together. He gets me, I get him,' she gushed.

More than money: Kylie told Desert Island Discs host Kirsty Young she now realises there is more to life than fame and fortune